Casing-head attachment



F. KINZBACH. CASlNG HEAD ATTACHMENT. APPLICATION FILED FEB: 16, 1921.

Patentedi Aug 8, 1922.,

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me 7 1 i FRANZ IKENZBACH, 6F HUMBLE, S.

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raaaosa Specification of Letters Patent.

Patented Aug. 8, W922,

T 0 all whom it may concern Be it known that I, FRA K KINZBACH, a citizen of the United States, residin Humble, in the county of Harris and tate of Texas, have invented a newv and useful Casing-Head Attachment, of which the following is a specification.

This invention relates to an attachment for heads of well casings of that type utilining slips such as shown, for-example, in Patent No. 1,326,27 2 issued to me on December 30., 1919.

it is an object of the present invention to provide means whereby the slips can be supported out of active positions in the casing head during the lowering of the tubing but which slips can be quickly released so as to engage the tubing and grip it to support the same and prevent the tubing or piping from dropping in a well.

Another ob ect is to provide means whereby the slips can be supported in position for use sothat should the tubing begin to fall positionunder the couplings on the tubing the workmen can quickly trip the slips, thereby enabling them to fall into gripping or piping so as to stop the falling of said tubing.

A further object is to provide connections for the slips which allow said slips to be raised automatically by the couplings on the tubing or piping during the raising of said tubing, the said slips immediately dropping back automatically to active positions after the couplings have passed between them.

With the foregoing and other objects in view' which willappearas the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of What is claimed, changes in the precise embodiment of the invehtion shown can be made without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings Figure 1 is a plan view of the attachment,

thetubing gripped by the slips being shown in section.

- Figure 2 is a section on line 22, Figs ure 1.

' Referring to the figures by characters of. reference 1 designates side strips each of *pins 11 frornthe slot extensions 10.

i which includes a central portion 2 adapted to-straddle the upper portion of. the casing head H. These opposed strips 1 are held together by cross bolts 3 aud t, the bolts 4 being extendedthrough the upstanding ends 5 of the strips 1. These bolts 4 constitute pivots forlevers 6 which extend toward each other and are oppositely disposed, the inner ends of the levers being pivotally connected to slips S such as shown in my patent hereinbefore. mentioned.

Loosely straddling each of the levers '6 is of each lever is a longitudinal slot 9 pro- I 'vided at its upper end with an outwardly pro ect1ng extension 10. A. transverse pin 11 is carried by each lever 6 and the terminals of this pin work within the slots 9 in the lever 7 adjacent thereto.

it is to be understood that under normal conditions the slips S are seated within the head H and that the pins 11' are located in the lower portions of the slots 9. Thus when r the tubing (3 is pulled upwardly.- the slips will work loose in the head and as each coupling 0 comes against thelower ends of the slips S it will push them upwardly until the coupling has upon the slips willgravitatebackto their gripping positions. Obviously, therefore,

the tubing 0 cannot'drop downwardly in the well because one of the couplings 0 would be bound to come against the slips S which would act as stops.

When it is desired to lower tubing 01 pipes into the well the levers 6 are swung upwardly so that the pins 11 become seated within the extended portions 10 of the slots ,9. Thus the slips are held elevated and the casing C with its couplings 0 can be lowered through the head. If, however,'the

suppcrts should break or the tubing C sheuld drop accidentally or from any other cause, all that is necessary to stop the descent is for the workmen standing nearby to pull outwardly on the levers *Z thus vto unseat the (1on sequently the slips S will promptly gravitate into the head and engage the tubing so as to gripit and prevent it from continuing its downward movement. Y r

I It will be apparent that by providing an attachment such as herein described many assed above them whereof the accidents and the resultant costly de- 5 1. The combination with the head of a.

well casing having downwardly converging faces, of opposed slips insertible :down- Wardly into the head for gripping a casing therebetween, oppositely disposed arms connected to and extending from Tthe head, levers fulcrumed at their outer ends on the arms and overhanging the head, said levers being connected to the upper ends of the slips, tripping levers pivotally connected to and extending upwardly from the arms, and cooperating means upon the tripping levers and'the slip engaging levers for supporting the slips in elevated positions partly above the head.

.2. The combination with a casing head having a tapered casing receiving opening,

of opposed slips insertible downwardly'into the opening for bearing against the Wall of the opening and gripping a casing, said slips projecting above the head, oppositely extending arms extending from the head,

levers fulcrumed at one end on the arms and connected at their other ends to the respecmy own, I have hereto aflixed my signature in the presence of two witnesses.

p FRANK KINZBACH. Witnesses:

T. E. MOORE, F. K. WISE. 

